Rust CI: deny warnings #196

Job	Run time
Check	2m 5s
Check wasm32	1m 13s
Clippy	2m 11s
build (macos-latest, aarch64-apple-darwin)	2m 28s
build (macos-latest, x86_64-apple-darwin)	2m 29s
Rustfmt	15s
Test Suite	4m 55s
trunk	1m 40s
build (ubuntu-latest, arm-unknown-linux-musleabihf)	3m 59s
build (ubuntu-latest, armv7-unknown-linux-musleabihf)	3m 58s
build (ubuntu-latest, x86_64-unknown-linux-musl)	3m 54s
build (windows-latest, x86_64-pc-windows-msvc, .exe)	3m 55s
	33m 2s

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